Heating-drum



(No Model.)

D. s. RICHARDSON.

HEATING DRUM.

Patented Apr. 19, 18.87.

N, PETERS, Plmto-lmogmplmr. wmhlngton. D. C.

UNITED STATES PATENT OFFICE.

DWIGHT SUMNER RICHARDSON, OF BROOKLYN, NEV YORK.

HEATING-DRUM.

SPECIFICATION forming part of Letters Patent No. 361,322, dated April19, 1887.

Application tiled June 18, 1884. Serial No. 135,382. (No model.)Patented in CnnadaMarchlO, 1884, No. 18,920.

. To a/ZZ whom it may concern:

Be it known that I, DWIGHT SUMNER RICH- ARDSON, a citizen of the UnitedStates, residing in Brooklyn, in thel county of Kings and State of NewYork, have invented certain new and useful Improvements inHeating-Drums, of which the following is a full, clear, and exactdescription. y

rlhe invention relates particularly to heatradiating drums which areemployed in connection with the combustion-chambers of hotair furnaces;but my improvements may be applied in heating-drums which are to be usedin other connections.

In United States Patent N o. 272,326, issued to me February 13, 1883, isshown a drum the walls of which are cast in one continuous piece ofmetal, t-he space inclosed therein being divided horizontally by adiaphragm, two par-- 'allel tlues being thus formed for the passage ofthe products of combustion, the object ot' the construction being todirect the ascending currents ina zigzag course, irst toward the frontand then toward the rear of the drum, so as to insure thoroughutilization of the heat which is 'contained in such products. In UnitedStates Patent No. 279,666, issued to me June 19, 1883, the same generalcharacteristics are embodied; but the top andsides only of the drum areof one continuous casting, the bottom being aseparate and distinct plateor sheet attached to the walls at their base in any suitable mamier, andprovision is made for either casting the diaphragm with the Walls or forits separate formation and subsequent attachment thereto. Theseconstructions combine various advantages, and in their perfectutilization of the heat contained in the products of combustion, and intheir effectual prevention of the escape of deleterious gases from thedrum into the surrounding hot-air chamber, their use has been attendedwith satisfactory results. It has been found, however, that undercertain circumstances different portions of the walls of the drum expandand contract unequally, sometimes causing fracture of some one of theparts, to the consequent detriment of the purity of the contents of theair-chamber; and to avoid this I devised an invention which isdescribedin my application Serial No. 107 ,823, filed October 1, 1883.In that invention it was my object to provide in a drum which possessedthe general characteristics of those described in my two former patents,above referred to, means for the certain prevention of fracture of thepartsthrough unequal expansion and contraction of the same; and this wasaccomplished by constructing the radiator in two distinct flue-sections,one of whichrested loosely upon the other, the diaphragm or flue-platebeing loosely tted at a point near the j unction of the two sections. Inconnection with the description of that invention, I represented anddescribed certain modiwhich the diaphragm or flue-plate was not but wascast with one or with both of the two flue-sections; and it is thismodified construc tion which forms the subject of this invention, thesame having been disclaimed in the application above referred to.

In the drawings, Figure 1 represents a vertical longitudinal centralsection of a hot-air furnace which has one form of my improved radiatorapplied thereto, the diaphragm being cast with the upper section, whichrests by its edges within a packing-receptacle which is formed upon thelower section. Fig. 2 represents a vertical section through the body ofthe `radiator, the edges of the upper section resting in thepacking-receptacle of the lower section,'as in Fig. l, but having thediaphragm cast with the lower section. Fig. 3 represents averticalsection through the body of the radiatoror drum, the edges of the uppersection resting in the packing-'receptacle of the lower section, as inFigs. l and 2, bnt having a double diaphragm, one plate thereof beingcast with each of the two sections. Fig. 4 represents a vertical sectionof the body of the drum, the construction being similar to that which isshown in Fig. 3, but having the inner wall of the packing-receptaclemade of less vertical extent than the outer wall.

Under the construction described liability to fracture is avoided; noportion of theproducts of combustion can pass from the lower flue to theupper ue, except through the orifice provided therefor in the liuc-plateor diaphragm; all escape of gas is prevented; the parts are readilyassembled for use and as readed forms of the described construction, in-

placed loosely Within the radiator or drum,

ICO.

ily removed from place when occasion requires l it, and the heatcontained in the circulating currents is thoroughly utilized.

Referring to the parts shown in the drawings, A is the upper section,and A the lower section, of the radiator. B is the diaphragm when eastwith the upper section, and B the diaphragm when east with the lowersection.

I do not herein broadly claim a radiator or heating-drum which consistsof two distinct sections, one of which rests loosely upon the other, anda diaphragm which is placed at or near the point oi'junetion of the twosections,

and which divides the same into two parallel horizontal fines.

Having thus described my invention7 what I desire to claim and secure byLetters Patent isl. A heating-drum or radiator which eon sists ofa loweriiue section, an upper iiue-sec 2c tion, and a double diaphragm, onemember of 25 the diaphragm constituting an integral portion ol." thelower fine-section, and the other member of the diaphragm constitutingan integral portion ofthe upper flue-section.

l) WIG ll'l SUI Nllli lil() IM RDSN.

lVitnesses:

JAMES B. TAYLOR HENRY ',l. RICHARDSON.

